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Lasterday is the day before yesterday, two days ago.
We got home yesterday, but we only left lasterday, so it was a quick trip.
by Ded Jezter June 04, 2016
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A word used to describe or simplify saying "the day before yesterday".
Person 1: What did you do yesterday?
Person 2: I just slept all day, I was so worn out from lasterday's party.
by NirocDrof March 11, 2014
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when you remember doing something in the past but cant remember what day it was
mom: did your water the yard?

boy: yes.
mom:when
boy: uuumm lasterday
by Cerny Safir November 03, 2010
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